Add a new icon for language-specific guides

Signed-off-by: Usha Mandya <usha.mandya@docker.com>

_layouts/landing.html

@@ -85,7 +85,7 @@
         </a>
       </div>
       <div class="col-xs-12 col-sm-6 col-lg-4 card-holder">
-        <a class="card guides" href="/language/">
+        <a class="card language-guides" href="/language/">
           <h5 class="title">Language-specific guides</h5>
           <p>
             Learn how to containerize language-specific applications using Docker.

_scss/_landing.scss

@@ -159,7 +159,7 @@ body.landing {
     }
   }
 
-  $icons: rocket, download-docker, guides, whats-new, manuals, reference;
+  $icons: rocket, download-docker, guides, language-guides, whats-new, manuals, reference;
 
   .card {
     color: $body-text;

images/language-guides.svg

@@ -0,0 +1 @@
+<svg fill="none" height="59" viewBox="0 0 54 59" width="54" xmlns="http://www.w3.org/2000/svg"><rect fill="#2854a1" height="51" rx="6" width="42"/><g fill="#71cfff"><path d="m6 8h30v2h-30z"/><path d="m6 13h30v2h-30z"/><path d="m6 18h30v2h-30z"/><path d="m6 23h30v2h-30z"/><path d="m6 28h24v2h-24z"/><path d="m6 33h22v2h-22z"/><path d="m42.5 25c-6.3509 0-11.5 5.0745-11.5 11.3333 0 8.5 11.5 22.6667 11.5 22.6667s11.5-14.1667 11.5-22.6667c0-6.2588-5.1491-11.3333-11.5-11.3333zm0 17c-3.174 0-5.75-2.5387-5.75-5.6667s2.576-5.6666 5.75-5.6666 5.75 2.5386 5.75 5.6666-2.576 5.6667-5.75 5.6667z"/><circle cx="43" cy="37" r="7"/></g><path d="m39.428 34.004.732 1.476-3.204 1.524 3.204 1.44-.732 1.56-4.296-2.1v-1.8zm3.6766-2.856 1.944.456-2.424 10.788-1.944-.456zm3.1774 2.856 4.296 2.1v1.8l-4.296 2.1-.732-1.56 3.204-1.44-3.204-1.524z" fill="#fff"/></svg>